Nea Kameni Volcano — The Living Crater

In the middle of the caldera lies Nea Kameni (Νέα Καμένη, "New Burnt") — a young volcanic island that has only emerged from the sea in the last 2,000 years. The last eruption was in 1950, and the island is geologically highly active: fumaroles emit sulfur fumes, the ground is hot, and seismologists monitor the volcano around the clock. A visit to Nea Kameni is an encounter with the mighty forces that created — and nearly destroyed — Santorini.

The Boat Tour: Excursion boats depart daily from the old port of Fira (Skala) or from Athinios. The standard tour (25–45€, 3–5 hours) includes: a trip to the volcano, ascent to the crater rim (about 30 minutes, rocky path, sturdy shoes required), viewing of the fumaroles (yellow sulfur crystals, hot steam), and often a stop at the hot springs of Palea Kameni — an area where volcanically heated sulfur water flows into the sea and invites bathing (caution: the water stains swimsuits rust-brown!).

Extended tours additionally include a visit to Thirassia (lunch in Manolas) and a return trip along the caldera at sunset. The Sunset Volcano Cruise (from 50€) combines volcano, hot springs, Thirassia, and sunset views on the return trip — the most popular tour on Santorini.

Geology: The caldera was formed by the massive Minoan eruption around 1600 BC — one of the strongest volcanic eruptions in human history (VEI 7, comparable to Tambora 1815). The center of the formerly round island collapsed, and the sea flooded into the crater. Since then, Santorini is no longer round but crescent-shaped. Nea Kameni is the most recent evidence that the volcano remains active — geologists expect another eruption in the coming centuries.